bar. Calculate the theoretical and actual flow if it has a volumetric efficiency of 88%, the real mechanical power if the efficiency of the system is 92%.
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- A piston PDP has a 5-in diameter and a 2-in stroke andoperates at 750 r/min with 92 percent volumetric effi ciency.(a) What is its delivery, in gal/min? (b) If the pump deliversSAE 10W oil at 20°C against a head of 50 ft, what horsepoweris required when the overall effi ciency is 84 percent?A centrifugal pump developing 9 ft head at 1200 rpm is driven by a 3 hp motor. Impeller diameter is 6-in. Discharge is 1300 gpm. Determine the critical cavitation parameter ?Q-- Consider the following data relating toperformance of a centrifugal pump:speed 1200 rpm, flow rate 30 L/s, head 20 m, and power 5 kW. If the speed of the pump is increased to 1500 rpm, assuming the efficiency isunaltered, Find the new flow rate and head.
- A fi reboat pump delivers water to a vertical nozzle with a3:1 diameter ratio, as in Fig. If duct and nozzle frictionare neglected and the pump provides 12.3 ft of head tothe fl ow, what will be the outlet fl ow rate?( a ) 85 gal/min, ( b ) 120 gal/min, ( c ) 154 gal/min,( d ) 217 gal/min, ( e ) 285 gal/minA single-acting reciprocating pump, with a diameter of 18 cm and a stroke of 30 cm, delivers water at a rate of 0.18 m3/s. What is the percentage slip it delivers at 1,500 rpm?A pump has a suction condition of 50mm Hg vacuum pressure, 100mm diameter pipe and discharged condition of 250kpa at, 90mm diameter. The discharge tank is 50m elevation and the suction is 5m below the pump center line. If the discharge is 0.20 m3/s, find the pump efficiency for 260kw brake power. Answer: 74.32%
- A single-stage centrifugal pump having a suction pipe 254 mm in diameter anda discharge pipe diameter of 5 inches is being tested and found out to discharge 48 lps ofwater. A pressure gage connected to the inlet pipe reads 118 mm Hg vacuum and adischarge gage reads 150 kPa at a distance 100 cm above the point where the inletpressure was measured. If the kW rating of the driving motor is 12 kW, calculate a) thepump efficiency. b) if this pump runs at 1800 rpm, what will be the new discharge rate,head, and power developed if the pump speed was increased to 3600 rpm? Assumeconstant efficiency. c) Determine the pump type.A Pelton wheel works at the foot of a dam because of which the head available at the nozzle is 400 m. The nozzle diameter is 160 mm and the coefficient of velocity is 0.98, The diameter of the wheel bucket circle is 1.75 m and the buckets deflect the jet by 150°. The wheel-to-jet speed ratio is 0.45. Neglecting riction, calculate (1) the power developed by the turbine, (i) its speed and (i) hydraulic efficiency.A multi stage pump is required to deliver of 2 l/s water against a maximum discharge head of 240 m. The diameter of radial bladed impeller should not be more than 15 cm. Assume a speed of 2800 rpm. Determine the impeller diameter, and power. Overall efficiency is 0.7.
- A 5 MW turbine is developed under an effective head of 320 m. The turbine efficiency is85%. Velocity coefficient of the nozzle is 99%.(a)Select which is the appropriate turbine based on effective head. (b)What should be the wheel diameter in meters assuming it is 12 times the diameter of the jet?A centrifugal pump having a head-capacityrelationship given by the equation ha=180 –6.10 X 10-4 Q2, with ha in feet when Q is ingpm, is to be used with the system shownin the figure, For Z2-Z1= 50 ft, what is theexpected flowrate if the total length ofconstant diameter pipe is 600 ft and thefluid is water? Assume the pipe diameter tobe 4 inch and the friction factor to be equalto 0.02. Neglect all minor losses.A lift pump was used to collect water at 60 strokes per minute and 50 liters was collected. The lift pump has a bore of 10 cm and stroke of 15 cm. What is the volumetric efficiency of the lift pump?